// HTMLParser Library $Name: v1_6 $ - A java-based parser for HTML
// http://sourceforge.org/projects/htmlparser
// Copyright (C) 2004 Derrick Oswald
//
// Revision Control Information
//
// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/scanners/StyleScanner.java,v $
// $Author: derrickoswald $
// $Date: 2005/03/07 02:18:46 $
// $Revision: 1.39 $
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//

package org.htmlparser.scanners;

import org.htmlparser.Attribute;
import org.htmlparser.Node;
import org.htmlparser.Tag;
import org.htmlparser.lexer.Lexer;
import org.htmlparser.util.NodeList;
import org.htmlparser.util.ParserException;

import java.util.Vector;

/**
 * The StyleScanner handles style elements. It gathers all interior nodes into
 * one undifferentiated string node.
 */
public class StyleScanner extends CompositeTagScanner {
    /**
     * Create a style scanner.
     */
    public StyleScanner() {
    }

    /**
     * Scan for style definitions. Accumulates text from the page, until
     * &lt;/[a-zA-Z] is encountered.
     *
     * @param tag   The tag this scanner is responsible for.
     * @param lexer The source of CDATA.
     * @param stack The parse stack, <em>not used</em>.
     */
    public Tag scan(Tag tag, Lexer lexer, NodeList stack) throws ParserException {
        Node content;
        int position;
        Node node;
        Attribute attribute;
        Vector vector;

        content = lexer.parseCDATA();
        position = lexer.getPosition();
        node = lexer.nextNode(false);
        if (null != node)
            if (!(node instanceof Tag)
                    || !(((Tag) node).isEndTag() && ((Tag) node).getTagName().equals(
                    tag.getIds()[0]))) {
                lexer.setPosition(position);
                node = null;
            }

        // build new end tag if required
        if (null == node) {
            attribute = new Attribute("/style", null);
            vector = new Vector();
            vector.addElement(attribute);
            node = lexer.getNodeFactory()
                    .createTagNode(lexer.getPage(), position, position, vector);
        }
        tag.setEndTag((Tag) node);
        if (null != content) {
            tag.setChildren(new NodeList(content));
            content.setParent(tag);
        }
        node.setParent(tag);
        tag.doSemanticAction();

        return (tag);
    }
}
